lyx_mirror/src/mover.h

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// -*- C++ -*-
/**
* \file mover.h
* This file is part of LyX, the document processor.
* Licence details can be found in the file COPYING.
*
* \author Angus Leeming
*
* Full author contact details are available in file CREDITS.
*/
#ifndef MOVER_H
#define MOVER_H
#include <map>
#include <string>
/**
* Utility to copy a file of a specified format from one place to another.
* This base class simply invokes the command support::copy().
*/
class Mover
{
public:
virtual ~Mover() {}
/** Copy file @c from to @c to.
* This version should be used to copy files from the original
* location to the temporary directory, since @c to and @c latex
* would be equal in this case.
* \returns true if successful.
*/
bool
copy(std::string const & from, std::string const & to) const
{
return do_copy(from, to, to);
}
/** Copy file @c from to @c to.
* \see SpecialisedMover::SpecialisedMover() for an explanation of
* @c latex.
* This version should be used to copy files from the temporary
* directory to the export location, since @c to and @c latex may
* not be equal in this case.
* \returns true if successful.
*/
bool
copy(std::string const & from, std::string const & to,
std::string const & latex) const
{
return do_copy(from, to, latex);
}
/** Rename file @c from as @c to.
* This version should be used to move files from the original
* location to the temporary directory, since @c to and @c latex
* would be equal in this case.
* \returns true if successful.
*/
bool
rename(std::string const & from, std::string const & to) const
{
return do_rename(from, to, to);
}
/** Rename file @c from as @c to.
* \see SpecialisedMover::SpecialisedMover() for an explanation of
* @c latex.
* This version should be used to move files from the temporary
* directory to the export location, since @c to and @c latex may
* not be equal in this case.
* \returns true if successful.
*/
bool
rename(std::string const & from, std::string const & to,
std::string const & latex) const
{
return do_rename(from, to, latex);
}
protected:
virtual bool
do_copy(std::string const & from, std::string const & to,
std::string const &) const;
virtual bool
do_rename(std::string const & from, std::string const & to,
std::string const &) const;
};
/**
* Specialisation of the Mover concept that uses an external command
* to copy a file.
*
* For example, an XFig .fig file can contain references to external
* picture files. If such a reference has a relative path, then the
* copied .fig file will require a transformation of the picture file
* reference if it is to be found by XFig.
*/
class SpecialisedMover : public Mover
{
public:
SpecialisedMover() {}
/** @c command should be of the form
* <code>
* python $$s/scripts/fig_copy.py $$i $$o $$l
* </code>
* where $$s is a placeholder for the lyx support directory,
* $$i is a placeholder for the name of the file to be moved,
* $$o is a placeholder for the name of the file after moving,
* $$l is a placeholder for the name of the file after moving,
* suitable as argument to a latex include command. This is
* either an absolute filename or relative to the master
* document.
* $$o and $$l can only differ if the file is copied from the
* temporary directory to the export location. If it is copied
* from the original location to the temporary directory, they
* are the same, so $$l may be ommitted in this case.
*/
SpecialisedMover(std::string const & command)
: command_(command) {}
/// The template used to launch the external command.
std::string const & command() const { return command_; }
private:
virtual bool
do_copy(std::string const & from, std::string const & to,
std::string const & latex) const;
virtual bool
do_rename(std::string const & from, std::string const & to,
std::string const & latex) const;
std::string command_;
};
/**
* Manage the store of (Mover)s.
*/
class Movers
{
public:
/** Register a specialised @c command to be used to copy a file
* of format @c fmt.
*/
void set(std::string const & fmt, std::string const & command);
/// @c returns the Mover registered for format @c fmt.
Mover const & operator()(std::string const & fmt) const;
/** @returns the command template if @c fmt 'finds' a
* SpecialisedMover. Otherwise, returns an empty string.
*/
std::string const command(std::string const & fmt) const;
private:
typedef std::map<std::string, SpecialisedMover> SpecialsMap;
public:
typedef SpecialsMap::const_iterator iterator;
iterator begin() const { return specials_.begin(); }
iterator end() const { return specials_.end(); }
private:
Mover default_;
SpecialsMap specials_;
};
extern Movers movers;
extern Movers system_movers;
#endif // MOVER_H